GE Kelman DGA 900 Plus - Table of Contents

MA-041 – DGA 900 Plus - Installation & Commissioning Manual - Rev 1.1 4-Mar-22 Page 2 of 99
Contents
Page
1 Introduction ...................................................................................................... 7
1.1 Product Overview ................................................................................................................................ 7
1.2 Scope ........................................................................................................................................................ 7
2 Safety ................................................................................................................. 8
2.1 Symbols ................................................................................................................................................... 8
2.2 Safety Statements .............................................................................................................................. 8
3 Technical Specifications ..............................................................................10
4 Compliance .....................................................................................................12
5 Transformer Monitoring System (TMS) ...................................................13
5.1 TMS Options ....................................................................................................................................... 15
6 Card Option #1: Thermal Models ...............................................................17
6.1 Sensor Input Configuration .......................................................................................................... 17
6.2 Wiring .................................................................................................................................................... 17
6.3 Temperature Sensors ..................................................................................................................... 18
6.4 CT Sensors ........................................................................................................................................... 21
7 Card Option #2: Cooling Status Monitor .................................................23
7.1 Sensor Input Configuration .......................................................................................................... 23
7.2 Wiring .................................................................................................................................................... 24
8 Card Option #3: OLTC Monitor ...................................................................26
8.1 Sensor Input Configuration .......................................................................................................... 26
8.1.1 Tap Position Sensor ......................................................................................................................................... 26
8.1.2 Motor Torque Measurement ........................................................................................................................ 26
8.2 Motor Power Converter ................................................................................................................. 30
9 Card Option #4: Bushing & PD Monitor ....................................................33
9.1 Installation Layout ........................................................................................................................... 33
9.2 Inside the Hub Module ................................................................................................................... 34
9.3 Power & Communications ........................................................................................................... 36
9.4 Bushing Adaptors ............................................................................................................................. 36
9.4.1 Bushing Adaptor Cables ................................................................................................................................ 37
9.4.2 Install a Bushing Adaptor .............................................................................................................................. 44
9.5 High Frequency Current Transformer (HFCT) ..................................................................... 47
9.6 Magnetically Mounted Temperature Sensors ..................................................................... 50
9.7 Cabinet Connections ...................................................................................................................... 52
9.7.1 Bushing Adaptors & Neutral CT(s) ............................................................................................................. 52
9.7.2 Magnetically-Mounted Temperature Sensors ...................................................................................... 53
9.8 Bushing Adaptor Circuit Integrity Test Record.................................................................... 54
9.8.1 Required Material ............................................................................................................................................. 54
9.8.2 Test Procedure .................................................................................................................................................. 55
10 Commissioning & Service ............................................................................71
10.1 Factory Settings ................................................................................................................................ 71
10.2 Models ................................................................................................................................................... 72
10.3 OLTC Monitor Commissioning .................................................................................................... 73
10.3.1 Prerequisite Commissioning Steps ........................................................................................................... 74
10.3.2 Establish Baseline Settings .......................................................................................................................... 77
10.3.3 Download DGA 900 Plus data to Perception ......................................................................................... 79
10.3.4 Generate Configuration Files ....................................................................................................................... 81